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<div class="section" id="boost-mpl-cfg-no-preprocessed-headers">
<h1><a class="toc-backref" href="./configuration.html#id1598">BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS</a></h1>
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<span id="boost-mpl-cfg-no-preprocessed"></span><h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
<pre class="literal-block">
// #define <a href="./cfg-no-preprocessed-headers.html" class="identifier">BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS</a>
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<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
<p><tt class="literal"><span class="pre"><a href="./cfg-no-preprocessed-headers.html" class="identifier">BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS</a></span></tt> is an boolean configuration macro
regulating library's internal use of preprocessed headers. When defined, it
instructs the MPL to discard the pre-generated headers found in
<tt class="literal"><span class="pre">boost/mpl/aux_/preprocessed</span></tt> directory and use <a class="reference external" href="http://boost-consulting.com/tmpbook/preprocessor.html" target="_top">preprocessor
metaprogramming</a> techniques to generate the necessary versions of the
library components on the fly.</p>
<p>In this implementation of the library, the macro is not defined by default.
To change the default configuration, define
<tt class="literal"><span class="pre"><a href="./cfg-no-preprocessed-headers.html" class="identifier">BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS</a></span></tt> before  including any library
header.</p>
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<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
<p><a class="reference internal" href="./macros.html">Macros</a>, <a class="reference internal" href="./configuration.html">Configuration</a></p>
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